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<br />SHIPPS PIT - WELD COUNTY <br />EXHIBIT D: WILDLIFE. WATER RESOURCES, VEGETATION AND SOILS INFORMATION <br />"CONTINUED" <br />ESTIMATED fd <br />COMMON NAME SCIENTIFIC NAME COMPOSITION BY WT. <br />Western Wheatgrass Agropyron Smithii 40 <br />Crested Wheatgrass Agropyron Desertorum 5 <br />Various Annuals (Asters, Tumbleweed, etu.) 4 <br />4. Soils <br />Based on information from the U. S. Soil Conservation Service the soil <br />in this area is known as altvan loam. It is a deep, well drained <br />soil on terraces and was formed in old alluvium from material <br />deposited by major rivers and creeks. <br />In the terraces the surface soil is loam about 10 inches thick. The <br />subsoil is clay loam and sandy clay loam about 15 inches thick. The <br />substratum is loamy sand or sandy loam over sand and gravel. <br />The present creek channel and previous pit area has sand and gravel <br />at the surface. While the exact gravel depth has not yet been <br />determined, previous excavations have indicated over eight feet of <br />gravel. <br />